Răspuns:
1.
5=1,5
16=1,2,4,8,16
23=1,23.
27=1,3,9,27.
28=1,2,4,7,16,28.
33=1,3,11,33.
42=1,2,3,7,14,42.
63=1,3,7,9,21,63.
64=1,2,4,8,16,32,64. 80=1,2,4,5,8,10,16,20,40,80
Ex2.
Multiplii
4=24,28,32,36,40,44,48,52,56,60,64,68,72,76
6=24,30,36,42,48,54,60,66,72
9=28,36,45,54,63,72
Ex3.
48,54,60,66,72,78-raspuns: 12numere